Changes in PHP index by group and measurement period
| Group | N | Base | 1 week | 2 weeks | 4 weeks | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Mean | SD | Mean | SD | |||||
| E1 | 30 | 2.23 | 0.39 | 2.18 | 0.36 | 2.07 | 0.32 | 2.04 | 0.37a | |||
| E2 | 30 | 2.16 | 0.49 | 2.07 | 0.45 | 2.15 | 0.35 | 2.09 | 0.43ab | |||
| NC | 30 | 2.16 | 0.37 | 2.21 | 0.30 | 2.21 | 0.36 | 2.35 | 0.35b | |||
| PC | 30 | 2.21 | 0.41 | 2.06 | 0.44 | 2.09 | 0.34 | 2.08 | 0.41ab | |||
| p-value+ | .833 | .376 | .424 | .011 |
SD: standard deviation, E1: experimental group, E2: comparison group, NC: negative control group, PC: positive control group.
+p value by one way ANOVA, abSame letter means no statistical difference by Scheffe test.
